The period of validity of the EIA approval report is five years. According to Article 24 of the Law of the People's Republic of China on Environmental Impact Assessment, if the environmental impact assessment document of a construction project is decided to start construction only after more than five years from the date of approval, the environmental impact assessment document shall be submitted to the original approval department for re examination.

After the environmental impact assessment document of the construction project has been approved, if the nature, scale and location of the construction project have undergone major changes in the production technology or measures to prevent pollution and ecological damage, the construction unit shall re submit the environmental impact assessment document of the construction project for approval. Lanzhou Environmental Impact Assessment Report

If the environmental impact assessment document of a construction project has been approved for more than five years before the decision is made to start construction of the project, the environmental impact assessment document shall be submitted to the original approval department for re examination; The original approval department shall notify the construction unit of the review opinions in writing within ten days from the date of receiving the environmental impact assessment documents of the construction project.

There is only one examination for environmental assessors a year. The subjects of the examination are: Laws and Regulations Related to Environmental Impact Assessment, Technical Guidelines and Standards for Environmental Impact Assessment, Technical Methods for Environmental Impact Assessment and Case Analysis of Environmental Impact Assessment.